Stay-bolt-drilling machine.



4 SHEETS-SHEET 1.

Patented June 9, 1914.

OARPER.

STAY BOLT DRILLING MAUHINE.

APPLICATION FILE-D JUNE 30, 1913.

K. H/OARPER.

STAY BOLT DRILLING MACHINE.

I V APPLICATION FILED JUNE 30, 1913. 1 099 425 Patented June 9,1914

4 SHEETS-GHEET 2.

IIHIHII 3. I 50 gwuewtoz KH- CRRPER.

wi imeooeo (30%); w. Eat C5 M Km K. H. UARPBR.

STAY BOLT DRILLING MACHINE.

APPLICATION FILED JUNE 30,1913.

Patented June 9, 1914:.

4 SHEETSSHEET 3.,

, K'H'CHRTPER. W W W G1.\9.H 4

K. H. OARPER.

STAY BOLT DRILLING MACHINE.

APPLICATION TILED JUNE 30, 1913.

Patented June 9, 1914.

4 SHEETS-SHEET 4. 42

wummo KENT H. GAMER, or RICHMOND, VrRoINret, ASSIGNOR r RICHMONDsir-armour DRILLING MACHINE MANUFACT ING (30., INCL, or RICHMOND;VIRGINIA, A

coiaronn'rlon or VIRGINIA.

s'rAY-BoLrmrtILLING MACHINE.

To all whom it may concern.

Be it known that I, KENT H. CAhrEu, a citizen of the United States,residing at Richmond, in the county of Helnrico and State of Virginia,have invented certain new and useful Improvements in Stay-Bolt-Drilt ingMachines, of which the following 1s a specification, reference being hadto the accompanying drawings.

This invention eomprehends certain new and useful improvements indrilling machines and relates 'iarticularly to machines for drillingstay-bolts for steam boilers and the like, the present invention beingof the type wherein the drill bits and spindles are designed, in, theoperation of the machine, to be continuously rotated about their ownaxes and as a whole or gang, rcvolnble about the vertical central axisofthe machine.

The present invention has for its primary object a simple, durable andetlicient construction of machine of this character in which the drillholder is rotated about a vertical axis while the workholdcrs are carqried around along with the drills and caused to inove one after anotherupwardly into operative engagement 'witlrthe depending, verticallydisposed drills, through the instru mentality of a cam which engages thework holders and on which the latter ride and which is so termed that atthe coin lotion of the drilling operation, the bolt whie i has beenfully drilled will be abruptly lowered and released from the drill,whereupon it may be removed and another undrilleil bolt applied.

The invention has for ,its further object a machine of this class whichwill be compact and take up comparatively little floor space; which willbe composed of comparatively tow and simple parts that may be easilyremoved and not liable to et out of order, while at the same time beingsusceptible ot ready detachment should any part become broken orotherwise need repair or replace ment; which will embody a lurality otbolt-holding frames, each of wliich independently removable relative tothe others, whenever required; and which will hold the bolts securely inoperative relation to the continuously rotating and revolving: drills,the drills being designed to revolve at all. times in a horiaontalplane, while the boltl1olding :trames are successively raised one afterthe other into radually increasing enpen tentwith the grille until theopenings Specification of Letters Iatent.

Application filed June 30, 19.13.

Patented June 9, 1914:.

Serial no. 776,625.

in the bolts are at the required depth, whereupon each bolt will belowered with its supportmg or carrying frame completely out oiengagement with the drill above it and can beremoved and easily replacedby another undrillcd bolt.

A still further object of the invention is a machine of this eluiracterembodying immeans for continuously rotating the drills about their ownaxes.

And the invention also aims to generally improve devices of .this classso as to render them more useful and commercially desirable.

With these and other objects in view, as

will more fully appear as the description proceedsthe invention consistsin certain constructions, arrangements and combinations Of the partsthat l shall hereinafter fully describe and claim.

For a full uiulcrstaruliiui; ol' the invention, reli rence is to be hadto the following" description. and acconipanyinp; drawings, in which--Figure '1 is a side elevation eta vertical l io. 5 a fragmentary detailsectional view otone of the drill spindles and its surrounding; parts.Fin. (3 is a. .lfragrn'icntary horizontal section through a. portion ofthe rev oluble column which can ice the bolt holders and supports andcarries the drills. Fig. 7 is a top plan view partly brolccn out. Fig. 8is a horizontal scctiimal view on the line El----tl, of l ig. Fig. 9 isa similar view on the line 9 9, of Fig. El. l iu. 1.0 is a horiaontalsectional view on the line 10-10, oi .ltig. 3. Fig. 11. is an enlar 'cdhorizontal section on the line lit s --'l'l, o'l' t 1g; 3, showing thebolts and bolt holders in po tion, and, l ig. til is a bottrun plan viewoi the lower plate which constitutes part ot the revolublo drill carriershowing the arrangement of branched pipes tor conveying a drill-coolingthud. to the drill.

. lower .endof which is mounted within the and 3.

basel and the upper end of which is stayed and strengthened by a brace 5which is secured upon the upper end of a standard 6, the lower end ofwhich is mounted within a pedestal 7, .as clearly indicated in Figs. 1.

Secured upon the upper end of the base 1 is a preferably hollow camSwhich is fixed in position and within which is received,.the lower endof a tubular supporting column 9 which is polygonal in cross section, asclearly illustrated in Figs. 10 and 11, having sixsides or faces in thepresent instance, as there are six drills and bolt holders in thisembodiment of my-invention, although itis to 'be understood thattheinvention is not limited in this regard. This supporting column isintended to have a revoluble move. ment around the post 4, and in thepresent instance is supported at its lowerend upon the base of the cam8, but it is to be "understood that antifriction bearings of anycharacter may be supplied atgany desired points to reduce the frictionof this revoluble movement to a minimum.- 7

A horizontally disposed .disk 10 is-secured in any desired way as bystud bolts tothe upper end of the column 9 to turn therewith around thep ost4, said disk being formed with openings 11 extending therethroughand defined on the lower side of the disk by bosses 12.. The drillspindles 13 are mount ed for rotation within the openings 11 and extendupwardly through corresponding openings 14 that are formed (in registrywith the openings 11) in bossed portions of another disk 15 which isarranged superjacent to and in spaced relation with the disk 10, thespaced relation between these two disks being maintained by spacerblocks 16, as bestillustrat/ed in Fig. 1.

Interposed between the disks 10 and 15,

are spur pinions 17 that are secured to the respective spindles 13andthat are designed for engagement with a gear wheel 18 that is mountedwithin the circle of the plurality of pinions 17 between the disks 15and 10. The gear wheel 18 is formed on the lower end of .a hub 19 whichsurrounds the upper end of the post 4 with its upper end in contact withthe lower side of the inner end of the brace 5 hereinbefore referred to,and a band wheel 20 or similar driving element is keyed orotherwisesecured to the upper end of the tubular hub 19, a belt 21passing around said wheel and around idlers 22, thence passing to anclfrom a driving shaft or pulley (not shown) which receives its motionfrom any suitable source of power.

The disks 10 and 15 constitute the main portions of the drill carrier,the drills 23v projecting downwardly from chucks 24 which are ballbearing, as best illustrated in Figs. 1 and'3, andwhich are secured tothe lower ends of the spindles 13. The spindles receive a rotarymovement about their own axes through the instrumentality of the gearwheel 18 meshing with the pinions 17 and the gang or'series .of drillsand drill spindles receives a revoluble movement about the post 4 as anaxisby means of the lower disk 10 which. is formed on its periphery, asbest illustrated in Fig. 8, with sprocket te'eth25, around which adrivingchain 26 passes,.saidchain alsoat one point of its traversepassing around a sprocket wheel 27. Thesprocket wheel 27' is mounted onthe upper end of a vertically disposed shaft which is journaled in abracket 28secured to the standard 6, as clearly illustrated in thedrawings, and the said shaft also. carries a worin gear wheel 27 whichmeshes with a worm (not shown) on a horizontally disposed shaft 27whichcarries a pulley 28 around which a driving belt 28 passes, asillustrated in Fig. 1. 7.

Each face of the revoluble column 9 is formed with a'verticallyelongated way or recess 29, the side walls of whichare over lapped ,byretaining and guide plates 30- that are secured in place by stud boltsor similar fastening devices and that engage overthe outer faces ofvertically disposed bars 31 which form parts ofjsubstantially of theseframes 32 comprises, in addition to the bar 31, an upper laterallyprojecting and horizontally disposed bar 33 and a lower bar 34 which isformed with a substantially radial and outwardly projecting offsetextension 35 connected at its outer end' by a -rectangular bolt-holdingframes 32. Each I spacer or tie rod 36 with the outer end of the upperbar 33. The lower bar 34 has ad ustably secured to it by a slot and boltconnection, a dog. 37 which is formed at its outer end with a preferablyangular or V- shaped notch 38 designedto engage the inner side of a'bolt near the lower end of the preceded in connection with thecorrelated vieWsof the accompanying drawings, it will be understood thatas a rotary motion is impartedto the band or driving wheel 20. Thismotion will be transmitted-thereby to the gear-wheel 18 and from thenceto the drill spindles 13 to impart a continuous rotary movement to thespindles about their own axes, while at the sametime, the driving chain26 will rotate the drill holder or carrier bydirect engagement with thelower disk 10, and the drills will be carried around in a circle, thecolumn 9 being also rotated about thepost l as an axis, This movement ofthe column 9 will obviously carry the bolt holders around with thedrills, and as the bolt holders are arranged for a' free vertical-m'oveme'nt within" the slots orvrecessos 9 and for a rollingmovement uponthe upper surface of the cam 8, it will be understood thatsaid bolt holders will be moved upwardly into engagement with thohdrillbits and be permitted to lower after the holes have been drilled to therequired depth In the present dmbodiment of the invention, the operativesurface of the cam is shown plotted in Fig. 2, in which the point D inthe circular movement of the cam, is the highest point shown at thein'nncdiate. front center of Fig. 1. As the drill holders rotate in thedirection of the arrow shown in ll ip; 2, they will, one after theother, meet the abrupt drop illustratedin Fig. 1,, and the bolt whichhas been drilled to the fullest extent desired, will be at once droppeddown "with its carrier or holder and a boy or other attendant standing;at this point maypimn cdiately grasp the handle 42 and release the boltand remove it, and instantly replace it by an undrillcd bolt, Thus, itwill be understood that the bolts, one after another will bedrillediirst from point A to l3, then to l and to l), asthe holdcrstravel around on the gradually increasing upper surface of the cam andwill he dropped one after the other after they have been completelydrilled.

.lt will be seen, particularly by reference to :l ig. 3, that the boltholders and their bolt-engaging devices are so disposed that the boltswill be held in a vertical position in a circularly arranged seriesoutside of the margin of the cam 8 upon which the tcrfere at all withthe-bolts, but the latter will be permitted to drop freely in adowniward direction when the boy or other attendant stationed at therequired'point, re-

leases the bolt-clamping; devices 40, one after the other, the boltreleased dropping into any desired receptacle .01" being quickly graspedby the attendant and deposited in any suitableplace and beingimmediately thereafter replaced by an undrilled bolt.

In order to keep the drills cool, l mount upon the upper disk 15, areservoir 47 secured to the said disk by screws or the like, asillustrated in Fig. 9, and formed with openings 48 which extenddownwardly through the disk and lead to branched pipes 49, whereby thesoapy or similar drill-cooling fluid may drip down upon the drills. Inorder to save this fluid and use it over again repeatedly, a suctionpipe 50 extends at one end down into the drip troughfi and is connectedat its upper end to ,a rotary pumpbl of any desired construction whichis driven in any desired way. Also connected to this pump, is a pipe 52which e):- tcnds upwardly and discharges at its upper end into thereservoir 47 whereby the drippings wlnch fall down into the trough 3,

may be carried upward and again discharged into the reservoir.

ll'hllc the accompanylug drawings illus trate what I believe tube theprcl'rrrcd cmbodimcnt of my invention, it is to be understoml that theinvention is not limited thcrc- .l. l) (l to, but that various changesmay be made in the construction, arrangement and proportions of theparts without departing: from the scope of the iiircntion as rlclincd inthe appended claims.

llhat 1' claim is:-- l. in a drilling machine oil the characlrrdescribed, the combination ol a drill carrier rcvolublc about a verticalaxis, a plurality oil. drills carried thereby, means for rotating thedrill carrier, means for rotating the drills durinsr'the revolution ofthe drill carrier. a pluralily oil work holders a support thereforrcvolublo, with the drill carrier and connected with the work l'loldcrs,and a 'cam engagciible by the work holders and adaptcd to cause thesan'ie to move to 'ard the drills, the work holders being provided withwk-engaging means for holding; the work outside of themargin ol the cam.p 2. in a drilling machine ol the character described, a drill carrierembodying upper and lower disks spaced from each other, drill spindlescarried by said disks, pinious secured to the respective drill spindleshotwccn said disks, a gear wheel mounted within the scries o'l piuionsand meshing}; therewith and disposed between said uppci and lower disks,a hub with which said gear wheel is provided, said hub projecting upllbwardlythrough the upper disk, a drive wheelconnectedto said hub abovethe'drill carrier, means engaging thelower disk for rotating the drillcarrier, and a revoluble holder movable with the drill'carrier.

3. In adri-lling'machineof the character described, adrilkcarrier-embodying upper and" lower disks spaced fr'om each other,-

'- drill spindles carried by said disks, pinions secured to' .therespective '.drill' spindles between said disks, a gear wheel mountedwithin the series-of pinions and meshing thereand disposed'betweenj'said' upper and lowerdisks, a hub with which" said gear wheel isprovided, said. vhub projecting up:-

wardly through the upper disk, a drive *wheel' connected to'said hubabove the drill carrier, means engaging the lower disk for r rotatingthe drill earriensaid-means consist ing of adriv'echain and the lowerdiskbe in'g formed on its periphery with sprocket teeth engagingsaidchainfand a revolublez.

I ,workhblder movable with the drill carrier.

4. Ina drillinglmachine of the character described, a revoluble, drillcarrier embodyg.

ing lower and upper disks secured together III spaced relation,a'plurality of circularly arranged dri-l lspindles journaled in said.disks and provided between said disks with pinions, a gear wheelinterposed between saiddisks andwithin the circle of said pinions" andmeshing with the latter, said gear wheel being provided with ahubprojecting upwardly through the upper disk to a point above the drillcarrier, a band wheel secured to 'the hubat'the upper end thereof,adrivl ing belt extending around'sa-id wheel to turn the same and thegear wheel to rotate the drill spindles, mcans'for' rotating the drillcarrier, and a revoluble work holder move able with the drill carrier.

A machine of the character described,

v including a revoluble drill carrier, rotatable drills carried thereby,means for rotating the carrier, means for rotating the drills, a

rotatable column movable with the drill car- I lurality of framesmounted for a rier, a longitu inal movement on and carried by saidcolumn, saidframes including upper and lower bars, the lower bars eachbeing provided with. an outwardly projecting offset andv radiallydisposed extension, boltengaging dogs carried by said upper and;

lower bars, and releasable bolt-clamping de vices carried by theextensions of the lower bars, for the purpose specified, and a camengageable by said lower bars and adapted to move the frames in adirection to carry them into operative relation to the drills.

' 6. A machine of the character described,

including a revoluble drill carrier, rotatable drllls carried thereby,means for rotating the carrier, means for rotatlng the drills, a 1'0-tatablecolumn movable with the drill carrier, aplurality of framesmounted for a longitudinal movement on and carriedby said column, saidframes including upper and lower bars, the lower bars each beingprovided with an outwardlyprojecting offset and radially disposedextenslon, bolt-engaging dogs carried by said upper: and lower.

bars, and releasable bolt-clamping devices carried by the extensions ofthe lower bars, for the purpose specified,-and a cam engageable bysaid-lower bars and adapted to move the frames in a direction to carrythem into operative relation to the drill s,- the boltengaging dogsbeing formed with V notches and having radially. adjustable connectionswith thearms to which they are connected.

7 ."In a drilling machine of the character described, arevoluble drillcarrier, rotatable the drill carrier, means for rotating the drills asthey are carried around by the drill car; rier, a column rotatable withthe dull calfrier and provided with longitudinal ways, retaining platessecured to the column and overlapping'the sides of the ways, bolt-hold-'ing 'franies movable in said ways and en- 'gaged by said retainingplates, means carried by-the frames for holding bolts therein in.longitudinal alinement with the drills, and a'cam at the lowerend of thesupport, the fr mes being mounted to ride upon said cam, w ereby thebolts carried by the frames "drills carried thereby, means for rotatingwill "be moved, one after another,'into.operative relation to thedrills.

described, a drill carrier embodying upper and lower disks spaced fromeach other, drill spindles carried by said disks, pinions secured to therespective drill s indles between said disks, a gear whee within theseries of pinions and meshing therewith and disposed between said upperand lower disks, a hub with which said gear wheel is provided, said hubprojecting upwardly through the upper disk, a drive wheel connected tosaid hub above the drill carrier, and means engaging the lower disk forrotating the drill carrier, said means consisting of a drive chain, asprocket wheel around which said chain passes, a worm gear wheel movablewith the sprocket wheel,

means for rotating the worm gear wheel, the. lower disk; being formed onits periphery 8. In a d rilling'machine of thecharacter mounted

